I've replaced the sun with a larger star to simulate the Solar System within the next couple billion years, when the sun begins to expand. Earth and the rest of the inner planets are molten, and Saturn is in the habitable zone. I placed a planet within Saturn's orbit to show what Titan may possibly be like when it's in the habitable zone.

a blindingly bright 6-jupiter mass rock at 0K emerges from a collision of two red stars orbiting a blue one.

Yeah collisions are pretty broken for the foreseeable future

We are aware of all the issues with collisions.It's number 1 on our priority list and Thomas, our physics specialist, is currently rewriting the system to address these problems, but also to add more features (like space elevators).

I collided two moons (M = 1 moon). Take a look at the mass of the selected moon (It doesn't appear on the print screen, but it is M = 0.0239 moons). the other moon and the debris all have about the same mass. Does anyone else think that there is a lot of mass missing? I think so

The Earth is a little too bright, don't you think? The other stars are too far away to make such a significant difference in the night side of the planet. I'm pretty sure the developers are aware of this poblem already and they will fix it soon. (This is the nearby stars simulations. You can see the sun in the pic, the other stars are behind

I made mars and Earth collide, at a low velocity, so no debris was thrown into space. Check out the mass of the Earth now. It no only didnt increase because of the mass of the planet mars, but it's gotten lower.

I've got 2 problems. I've created a solar system. This planet is 139 AU away from it's star. You can see that the star (Spica) isn't bright enough to illuminate the planet at all. And as you can see the surface temperature is -109 Cº

Then (in the second screenshot) I added 0.1 moon mass of atmosphere. It now not only is illuminated by the star, but also the temperture rose to an absurd number. I may not be an astrophysicist, but I'm pretty sure that's not accurate.